A series of mesoporous TiO₂ supports were synthesized by changing the hydrothermal temperature. Subsequently, CeO₂-WO₃/TiO₂ catalysts were prepared by impregnation method and applied for selective catalytic reduction (SCR) of NO_x with NH₃. In addition, the morphology of TiO₂ changed from microspheres to ellipsoidal microspheres by gradually increasing the hydrothermal temperature which was 120 °C, 160 °C and 200 °C. Obviously, the SCR activity was exhibited in the following order: CeO₂-WO₃/TiO₂-160 > CeO₂-WO₃/TiO₂-120 > CeO₂-WO₃/TiO₂-200. Among, the CeO₂-WO₃/TiO₂-160 catalyst exhibited better catalytic activity for the NH₃-SCR reaction. Through a series of characterizations, it was concluded that the mesoporous structure, redox ability and abundant surface acidity of the CeO₂-WO₃/TiO₂ catalyst played a critical role in improving the activity, resistant of H₂O and SO₂.

通过改变水热温度合成了一系列介孔TiO ₂载体。随后，通过浸渍法制备了CeO ₂ -WO ₃ / TiO ₂催化剂，并用于NH ₃对NO _x的选择性催化还原（SCR）。此外，通过逐渐升高水热温度（120°C，160°C和200°C），TiO ₂的形态从微球体变为椭圆形微球体。显然，SCR活性表现为以下顺序：CeO ₂ -WO ₃ / TiO ₂ -160> CeO ₂ -WO ₃ / TiO ₂-120> CeO ₂ -WO ₃ / TiO ₂ -200。其中，CeO ₂ -WO ₃ / TiO ₂ -160催化剂对NH ₃ -SCR反应表现出更好的催化活性。通过一系列表征，可以得出结论，CeO ₂ -WO ₃ / TiO ₂催化剂的介孔结构，氧化还原能力和丰富的表面酸度在提高活性，抗H ₂ O和SO ₂方面起着关键作用。